Piston for a hydrostatic axial-piston machine

Details Piston for a hydrostatic axial-piston machine Piston for a hydrostatic axial-piston machine

1977-11-23

1980-08-12

Cohen, Irwin C.

Expansible chamber devices

With fluid purifying means

91488, 92158, 92181R, F15B 2104

Patent

active

042167043

ABSTRACT:
A piston for a hydrostatic piston machine, especially an axial-piston pump or motor in which the piston is formed with a ball head riding in a slide shoe which is supported by a fluid-pressure cushion against a countersurface, e.g. a swashplate. The piston is formed with a central passage which communicates with a bore in the ball head, this bore being provided with a throttle to prevent the fluid medium from being forced at an excessive rate into the fluid-pressure cushion and thereby lift the shoe from the countersurface. According to the invention, the end of the piston remote from the ball head is provided with a gap filter of large area and narrow gap width to prevent large particles from entering and blocking the passage and the throttle.

REFERENCES:
patent: 1466773 (1923-09-01), Trew
patent: 2299235 (1942-10-01), Snader et al.
patent: 3066609 (1962-12-01), Hann
patent: 3106138 (1963-10-01), Thoma
patent: 3828654 (1974-08-01), Wiethoff
patent: 3915071 (1975-10-01), Forster

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